Over the years, Microsoft's made some incredibly good moves, even if they felt like mistakes at the time: mashing Word and Excel into Office; offering Sabeer Bhatia and cohorts $400 million for a year-old startup; blending Windows 98 and NT to form Windows 2000; sticking a weird Israeli motion sensor on a game box; buying Skype for an unconscionable amount of money. (The jury's still out on the last one.)